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Salmon Migration at Sea

    Naturevolume 160pages3334 (1947) | Download Citation



    THE Buckland Foundation Lecture was given by J. W. Menzies at the University of Liverpool, on May 28, Prof. J. H. Orton presiding. Taking for his subject “The Migrations of Salmon in the Sea”, Mr. Menzies summarized the information learned from the experiments of marking salmon in Scottish, Norwegian, Baltic, and Canadian haunts, and suggested that European and Canadian salmon have a common feeding ground in the North Atlantic near Iceland, where a new marking station will probably be opened under international co-operation in a few years time. The only area where Salmo solar has been traced from the river of origin to its feeding ground in the sea and then back to the river as adult fish is the Baltic, where Swedish marking experiments showed that smolts left the northern Swedish and Finnish rivers in spring when only 5 in. long and reached the southern Baltic, 600–800 miles away, in October and November, when they weighed just over a pound after feeding; but they did not show evidence of passing out of this belt into the North Sea. Salmon apparently do not feed in the North Sea, or The Minch of western Scotland, or they would have been caught more often in the herring nets. The Swedish salmon feed in the southern Baltic for possibly up to two or three years before returning to their native rivers.

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